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Question

Which of the following is/are used for testing starch?


A

Iodine

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B

Magnesium

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C

Ammonia

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D

Sodium

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Solution

The correct option is A

Iodine


Iodine is commonly used to test whether starch is added to milk. When two or three drops of iodine solution are added to milk taken in a test tube, the solution turns dark blue-black. Addition of starch to milk makes the milk look thicker. Starch and water are the common adulterants used in milk.


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